The top plastic radiator tank is cracked on my '94 F150, 300 Six on top of the hose inlet. I tried repairing it with some putty like Billy Mays advertises, it worked for a few days and began leaking again. I patched it from the inside and on the outside, let it sit for 24 hours so it looks like this is not an option.

Is there any other way to stop the leak, if not I guess I'll be buying a radiator.

About 2 years ago the E4OD transmission went out, when the transmission place rebuilt it they bypassed the radiator and added a cooler. When I get my new radiator can I put the transmission lines back in the radiator and remove the external cooler?

Thanks,
Lil Josh

 

get new radiator.

either just use the add on cooler or use them both.

never have enough trans cooling.

 

quicklook2 is right just get a new one... Mine in my F-250 started leaking on the passenger side were the tank meets the radiator and i tried from RTV to Epoxy to stop the leak and none lasted more than a few days... I also use both an add on cooler and the radiator for the tranny...

 

WHAT!!!!............The Mighty Putty didnt work???!!!.......Billy Mays better give me my money back!

 

I would use the radiator and the external cooler for the transmission. Heat is the biggest enemy of modern automatics. The only way to repair broken plastic is to replace it.

 

Thanks to you all.
I'll get a new radiator.
On the transmission cooling; what if I also change the thermostat from a 195 degree to a 180 degree or less? Would that help to cool the transmission better?



I appreciate your replies,

Lil Josh

 

Stay with the 195 deg., truck will get better mpg at the factory intended op. temperature.

 

Will do.

Thanks,
Lil Josh

 

Don't get a new one. Take it to a guy who does radiator repair. It'll be less than half the price. It's always the hot side tank that breaks. Hot water enters one side and cooled water exits the other. The hot side tanks are what typically crack. A radiator guy will put you a new tank and they're supposed to be better plastic than the OE. I've had 4-5 rebuilt over the years and have never had to do one a second time yet.

The added extra cooler does much more cooling than the radiator does all by itself. The only trans cooling you get from a radiator is via a very small brass heat exchanger in one of the tanks. Water flows over it and cools it. That extra cooler you've got on there is an major upgrade. It provides 10-20 times the cooling than the radiator. That cooler is a major component of a towing package if you buy a truck with a towing package. They're not cheap either so I'd leave it as is. My 94 3/4 ton Suburban has a trans cooler on it that is 2/3 the size of the radiator and it has a giant radiator.